3111882421 has 2 divisors, whose sum is σ = 3111882422. Its totient is φ = 3111882420.

The previous prime is 3111882407. The next prime is 3111882481. The reversal of 3111882421 is 1242881113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1577201796 + 1534680625 = 39714^2 + 39175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3111882421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3111882401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1555941210 + 1555941211.

It is an arithmetic number, because the mean of its divisors is an integer number (1555941211).

Almost surely, 2^3111882421 is an apocalyptic number.

It is an amenable number.

3111882421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3111882421 is an equidigital number, since it uses as much as digits as its factorization.

3111882421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 31.

The square root of 3111882421 is about 55784.2488611257. The cubic root of 3111882421 is about 1459.9603449854.

The spelling of 3111882421 in words is "three billion, one hundred eleven million, eight hundred eighty-two thousand, four hundred twenty-one".